They have finally mapped the position of dark matter:
Astronomers have mapped the positions of vast, invisible isles of dark matter in the sky, within which normal "bright" matter galaxies are embedded like glittering gems. The three-dimensional map spans not only space, but also time, and stretches back to when the universe was only about half its present age.
Well, I guess it solves the problem of what happened after the sorceror got back to his apprentice.